'I look forward to the day that justice will be served to all the parties involved in my brother's homicide,' she said.

'I am thankful to investigators for uncovering the truth to the world.'

Jackson's body is loaded into a van to be taken to the Los Angeles County Coroner's office on June 25

Yesterday, Roy Black, a leading U.S. defence lawyer told an American breakfast TV show that the latest revelations - including a leak from the Los Angeles Coroner's office giving the cause of death as homicide - mean it is likely that Dr Murray will face criminal prosecution.

'I have no doubt he's going to be indicted. Just the amount of work tells us that,' he said.

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Mr Black claimed the events outlined by police, including the use of the powerful hospital anaesthetic propofol to treat Jackson's chronic insomnia, will be considered a 'highly reckless, dangerous situation' by prosecutors.

Another TV network said Dr Murray would be arrested imminently and charged with manslaughter.

The doctor has denied any wrongdoing and his lawyer, Ed Chernoff, said he denies leaving the singer alone after administering a series of sedatives to try to help him sleep.

Mr Chernoff said: 'Much of what was in the search warrant affidavit is factual. However, unfortunately, much is police theory.

'Most egregiously, the timeline reported by law enforcement was not obtained through interviews with Dr Murray, as was implied by the affidavit.'

Mr Chernoff said Dr Murray did not tell police he left the star's bedroom to make phone calls, as alleged in the police papers.

But he did not comment on the claim that records had shown Dr Murray was on the phone between 11.18am to 12.05pm, but had not told the police of such calls.

The Los Angeles Coroner's office was still refusing to comment last night on claims that preliminary forensic tests during the official postmortem examination found that a lethal dose of propofol, a hospital anaesthetic, reacted with at least two sedatives to cause Jackson's death.

The police probe is focusing on whether Dr Murray was criminally negligent in administering drugs to Jackson hours before his death.

According to court papers, Dr Murray said he had been treating Jackson for insomnia for about six weeks with a nightly dose of 50 milligrams of propofol via an intravenous drip.

But he said he feared Jackson was forming an addiction to the anaesthetic, which is normally only administered in hospital, and was attempting to wean him off it by lowering the dose to 25 milligrams and adding the sedatives lorazepam and midazolam.

When Jackson complained he was unable to sleep after rehearsing for his London shows, Murray gave him a 10-milligram tab of Valium at 1.30am on June 25.

The doctor told police he then tried different drugs to treat the sleepless star.

The injections included two milligrams of lorazepam around 2am, two milligrams of midazolam around 3am, and repeats of each at 5am and 7.30am. None appeared to work.

Dr Murray told detectives that around 10.40am he gave in to Jackson's 'repeated demands/requests' for propofol, which the singer referred to as his 'milk'.

He administered 25 milligrams of the white-colored liquid and Jackson fell asleep.

Dr Murray remained with him for about 10 minutes then left to go to the toilet, said investigators. Two minutes later, he returned and found Jackson had stopped breathing.

Dr David Zvara, an anaesthesia expert from the University of North Carolina, said: 'All those drugs act in synergy with each other.' He said that adding propofol on top of all the other sedatives 'tipped the balance.'